diff options
Diffstat (limited to 'gnome-session/gsm-systemd.c')
| -rw-r--r-- | gnome-session/gsm-systemd.c | 1189 |
1 files changed, 1189 insertions, 0 deletions
diff --git a/gnome-session/gsm-systemd.c b/gnome-session/gsm-systemd.c new file mode 100644 index 0000000..6ac6c9b --- /dev/null +++ b/gnome-session/gsm-systemd.c @@ -0,0 +1,1189 @@ +/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 8 -*- + * + * Copyright (C) 2011 Red Hat, Inc. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2, or (at your option) + * any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, see <http://www.gnu.org/licenses/>. + * + * Author: Matthias Clasen + */ + +#include "config.h" +#include "gsm-systemd.h" + +#ifdef HAVE_SYSTEMD + +#include <errno.h> +#include <string.h> +#include <stdlib.h> +#include <unistd.h> +#include <sys/types.h> +#include <pwd.h> + +#include <systemd/sd-login.h> + +#include <glib.h> +#include <glib-object.h> +#include <glib/gi18n.h> +#include <gio/gio.h> +#include <gio/gunixfdlist.h> + +#include "gsm-system.h" + +#define SD_NAME "org.freedesktop.login1" +#define SD_PATH "/org/freedesktop/login1" +#define SD_INTERFACE "org.freedesktop.login1.Manager" +#define SD_SEAT_INTERFACE "org.freedesktop.login1.Seat" +#define SD_SESSION_INTERFACE "org.freedesktop.login1.Session" + +#define SYSTEMD_SESSION_REQUIRE_ONLINE 0 /* active or online sessions only */ + +struct _GsmSystemdPrivate +{ + GSource *sd_source; + GDBusProxy *sd_proxy; + char *session_id; + gchar *session_path; + + GSList *inhibitors; + gint inhibit_fd; + + gboolean is_active; + + gint delay_inhibit_fd; + gboolean prepare_for_shutdown_expected; +}; + +enum { + PROP_0, + PROP_ACTIVE +}; + +static void gsm_systemd_system_init (GsmSystemInterface *iface); + +G_DEFINE_TYPE_WITH_CODE (GsmSystemd, gsm_systemd, G_TYPE_OBJECT, + G_IMPLEMENT_INTERFACE (GSM_TYPE_SYSTEM, + gsm_systemd_system_init)) + +static void +drop_system_inhibitor (GsmSystemd *manager) +{ + if (manager->priv->inhibit_fd != -1) { + g_debug ("GsmSystemd: Dropping system inhibitor"); + close (manager->priv->inhibit_fd); + manager->priv->inhibit_fd = -1; + } +} + +static void +drop_delay_inhibitor (GsmSystemd *manager) +{ + if (manager->priv->delay_inhibit_fd != -1) { + g_debug ("GsmSystemd: Dropping delay inhibitor"); + close (manager->priv->delay_inhibit_fd); + manager->priv->delay_inhibit_fd = -1; + } +} + +static void +gsm_systemd_finalize (GObject *object) +{ + GsmSystemd *systemd = GSM_SYSTEMD (object); + + g_clear_object (&systemd->priv->sd_proxy); + free (systemd->priv->session_id); + g_free (systemd->priv->session_path); + + if (systemd->priv->sd_source) { + g_source_destroy (systemd->priv->sd_source); + } + + if (systemd->priv->inhibitors != NULL) { + g_slist_free_full (systemd->priv->inhibitors, g_free); + } + drop_system_inhibitor (systemd); + drop_delay_inhibitor (systemd); + + G_OBJECT_CLASS (gsm_systemd_parent_class)->finalize (object); +} + +static void +gsm_systemd_set_property (GObject *object, + guint prop_id, + const GValue *value, + GParamSpec *pspec) +{ + GsmSystemd *self = GSM_SYSTEMD (object); + + switch (prop_id) { + case PROP_ACTIVE: + self->priv->is_active = g_value_get_boolean (value); + break; + default: + G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); + } +} + +static void +gsm_systemd_get_property (GObject *object, + guint prop_id, + GValue *value, + GParamSpec *pspec) +{ + GsmSystemd *self = GSM_SYSTEMD (object); + + switch (prop_id) { + case PROP_ACTIVE: + g_value_set_boolean (value, self->priv->is_active); + break; + default: + G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); + break; + } +} + +static void +gsm_systemd_class_init (GsmSystemdClass *manager_class) +{ + GObjectClass *object_class; + + object_class = G_OBJECT_CLASS (manager_class); + + object_class->get_property = gsm_systemd_get_property; + object_class->set_property = gsm_systemd_set_property; + object_class->finalize = gsm_systemd_finalize; + + g_object_class_override_property (object_class, PROP_ACTIVE, "active"); + + g_type_class_add_private (manager_class, sizeof (GsmSystemdPrivate)); +} + +typedef struct +{ + GSource source; + GPollFD pollfd; + sd_login_monitor *monitor; +} SdSource; + +static gboolean +sd_source_prepare (GSource *source, + gint *timeout) +{ + *timeout = -1; + return FALSE; +} + +static gboolean +sd_source_check (GSource *source) +{ + SdSource *sd_source = (SdSource *)source; + + return sd_source->pollfd.revents != 0; +} + +static gboolean +sd_source_dispatch (GSource *source, + GSourceFunc callback, + gpointer user_data) + +{ + SdSource *sd_source = (SdSource *)source; + gboolean ret; + + g_warn_if_fail (callback != NULL); + + ret = (*callback) (user_data); + + sd_login_monitor_flush (sd_source->monitor); + return ret; +} + +static void +sd_source_finalize (GSource *source) +{ + SdSource *sd_source = (SdSource*)source; + + sd_login_monitor_unref (sd_source->monitor); +} + +static GSourceFuncs sd_source_funcs = { + sd_source_prepare, + sd_source_check, + sd_source_dispatch, + sd_source_finalize +}; + +static GSource * +sd_source_new (void) +{ + GSource *source; + SdSource *sd_source; + int ret; + + source = g_source_new (&sd_source_funcs, sizeof (SdSource)); + sd_source = (SdSource *)source; + + if ((ret = sd_login_monitor_new ("session", &sd_source->monitor)) < 0) { + g_warning ("Error getting login monitor: %d", ret); + } else { + sd_source->pollfd.fd = sd_login_monitor_get_fd (sd_source->monitor); + sd_source->pollfd.events = G_IO_IN; + g_source_add_poll (source, &sd_source->pollfd); + } + + return source; +} + +static gboolean +on_sd_source_changed (gpointer user_data) +{ + GsmSystemd *self = user_data; + int active_r; + gboolean active; + + active_r = sd_session_is_active (self->priv->session_id); + if (active_r < 0) + active = FALSE; + else + active = active_r; + if (active != self->priv->is_active) { + self->priv->is_active = active; + g_object_notify (G_OBJECT (self), "active"); + } + + return TRUE; +} + +static void sd_proxy_signal_cb (GDBusProxy *proxy, + const gchar *sender_name, + const gchar *signal_name, + GVariant *parameters, + gpointer user_data); + +static gboolean +_systemd_session_is_graphical (const char *session_id) +{ + const gchar * const graphical_session_types[] = { "wayland", "x11", "mir", NULL }; + int saved_errno; + g_autofree gchar *type = NULL; + + saved_errno = sd_session_get_type (session_id, &type); + if (saved_errno < 0) { + g_warning ("Couldn't get type for session '%s': %s", + session_id, + g_strerror (-saved_errno)); + return FALSE; + } + + if (!g_strv_contains (graphical_session_types, type)) { + g_debug ("Session '%s' is not a graphical session (type: '%s')", + session_id, + type); + return FALSE; + } + + return TRUE; +} + +static gboolean +_systemd_session_is_active (const char *session_id) +{ + const gchar * const active_states[] = { "active", "online", NULL }; + int saved_errno; + g_autofree gchar *state = NULL; + + /* + * display sessions can be 'closing' if they are logged out but some + * processes are lingering; we shouldn't consider these (this is + * checking for a race condition since we specified + * SYSTEMD_SESSION_REQUIRE_ONLINE) + */ + saved_errno = sd_session_get_state (session_id, &state); + if (saved_errno < 0) { + g_warning ("Couldn't get state for session '%s': %s", + session_id, + g_strerror (-saved_errno)); + return FALSE; + } + + if (!g_strv_contains (active_states, state)) { + g_debug ("Session '%s' is not active or online", session_id); + return FALSE; + } + + return TRUE; +} + +static gboolean +gsm_systemd_find_session (char **session_id) +{ + char *local_session_id = NULL; + g_auto(GStrv) sessions = NULL; + int n_sessions; + + g_return_val_if_fail (session_id != NULL, FALSE); + + g_debug ("Finding a graphical session for user %d", getuid ()); + + n_sessions = sd_uid_get_sessions (getuid (), + SYSTEMD_SESSION_REQUIRE_ONLINE, + &sessions); + + if (n_sessions < 0) { + g_critical ("Failed to get sessions for user %d", getuid ()); + return FALSE; + } + + for (int i = 0; i < n_sessions; ++i) { + g_debug ("Considering session '%s'", sessions[i]); + + if (!_systemd_session_is_graphical (sessions[i])) + continue; + + if (!_systemd_session_is_active (sessions[i])) + continue; + + /* + * We get the sessions from newest to oldest, so take the last + * one we find that's good + */ + local_session_id = sessions[i]; + } + + if (local_session_id == NULL) + return FALSE; + + *session_id = g_strdup (local_session_id); + + return TRUE; +} + +static void +gsm_systemd_init (GsmSystemd *manager) +{ + GError *error = NULL; + GDBusConnection *bus; + GVariant *res; + + manager->priv = G_TYPE_INSTANCE_GET_PRIVATE (manager, + GSM_TYPE_SYSTEMD, + GsmSystemdPrivate); + + manager->priv->inhibit_fd = -1; + manager->priv->delay_inhibit_fd = -1; + + bus = g_bus_get_sync (G_BUS_TYPE_SYSTEM, NULL, &error); + if (bus == NULL) + g_error ("Failed to connect to system bus: %s", + error->message); + manager->priv->sd_proxy = + g_dbus_proxy_new_sync (bus, + 0, + NULL, + SD_NAME, + SD_PATH, + SD_INTERFACE, + NULL, + &error); + if (manager->priv->sd_proxy == NULL) { + g_warning ("Failed to connect to systemd: %s", + error->message); + g_clear_error (&error); + } + + g_signal_connect (manager->priv->sd_proxy, "g-signal", + G_CALLBACK (sd_proxy_signal_cb), manager); + + gsm_systemd_find_session (&manager->priv->session_id); + + if (manager->priv->session_id == NULL) { + g_warning ("Could not get session id for session. Check that logind is " + "properly installed and pam_systemd is getting used at login."); + return; + } + + g_debug ("Found session ID: %s", manager->priv->session_id); + + res = g_dbus_proxy_call_sync (manager->priv->sd_proxy, + "GetSession", + g_variant_new ("(s)", manager->priv->session_id), + 0, + G_MAXINT, + NULL, + &error); + if (res == NULL) { + g_warning ("Could not get session id for session. Check that logind is " + "properly installed and pam_systemd is getting used at login: %s", + error->message); + g_error_free (error); + return; + } + + g_variant_get (res, "(o)", &manager->priv->session_path); + g_variant_unref (res); + + manager->priv->sd_source = sd_source_new (); + g_source_set_callback (manager->priv->sd_source, on_sd_source_changed, manager, NULL); + g_source_attach (manager->priv->sd_source, NULL); + + on_sd_source_changed (manager); + + g_object_unref (bus); +} + +static void +emit_restart_complete (GsmSystemd *manager, + GError *error) +{ + GError *call_error; + + call_error = NULL; + + if (error != NULL) { + call_error = g_error_new_literal (GSM_SYSTEM_ERROR, + GSM_SYSTEM_ERROR_RESTARTING, + error->message); + } + + g_signal_emit_by_name (G_OBJECT (manager), + "request_completed", call_error); + + if (call_error != NULL) { + g_error_free (call_error); + } +} + +static void +emit_stop_complete (GsmSystemd *manager, + GError *error) +{ + GError *call_error; + + call_error = NULL; + + if (error != NULL) { + call_error = g_error_new_literal (GSM_SYSTEM_ERROR, + GSM_SYSTEM_ERROR_STOPPING, + error->message); + } + + g_signal_emit_by_name (G_OBJECT (manager), + "request_completed", call_error); + + if (call_error != NULL) { + g_error_free (call_error); + } +} + +static void +restart_done (GObject *source, + GAsyncResult *result, + gpointer user_data) +{ + GDBusProxy *proxy = G_DBUS_PROXY (source); + GsmSystemd *manager = user_data; + GError *error = NULL; + GVariant *res; + + res = g_dbus_proxy_call_finish (proxy, result, &error); + + if (!res) { + g_warning ("Unable to restart system: %s", error->message); + emit_restart_complete (manager, error); + g_error_free (error); + } else { + emit_restart_complete (manager, NULL); + g_variant_unref (res); + } +} + +static void +gsm_systemd_attempt_restart (GsmSystem *system) +{ + GsmSystemd *manager = GSM_SYSTEMD (system); + + g_dbus_proxy_call (manager->priv->sd_proxy, + "Reboot", + g_variant_new ("(b)", TRUE), + 0, + G_MAXINT, + NULL, + restart_done, + manager); +} + +static void +stop_done (GObject *source, + GAsyncResult *result, + gpointer user_data) +{ + GDBusProxy *proxy = G_DBUS_PROXY (source); + GsmSystemd *manager = user_data; + GError *error = NULL; + GVariant *res; + + res = g_dbus_proxy_call_finish (proxy, result, &error); + + if (!res) { + g_warning ("Unable to stop system: %s", error->message); + emit_stop_complete (manager, error); + g_error_free (error); + } else { + emit_stop_complete (manager, NULL); + g_variant_unref (res); + } +} + +static void +gsm_systemd_attempt_stop (GsmSystem *system) +{ + GsmSystemd *manager = GSM_SYSTEMD (system); + + g_dbus_proxy_call (manager->priv->sd_proxy, + "PowerOff", + g_variant_new ("(b)", TRUE), + 0, + G_MAXINT, + NULL, + stop_done, + manager); +} + +static void +gsm_systemd_set_session_idle (GsmSystem *system, + gboolean is_idle) +{ + GsmSystemd *manager = GSM_SYSTEMD (system); + GDBusConnection *bus; + + if (manager->priv->session_path == NULL) { + g_warning ("Could not get session path for session. Check that logind is " + "properly installed and pam_systemd is getting used at login."); + return; + } + + g_debug ("Updating systemd idle status: %d", is_idle); + bus = g_dbus_proxy_get_connection (manager->priv->sd_proxy); + g_dbus_connection_call (bus, + SD_NAME, + manager->priv->session_path, + SD_SESSION_INTERFACE, + "SetIdleHint", + g_variant_new ("(b)", is_idle), + G_VARIANT_TYPE_BOOLEAN, + 0, + G_MAXINT, + NULL, NULL, NULL); +} + +static gboolean +gsm_systemd_can_switch_user (GsmSystem *system) +{ + GsmSystemd *manager = GSM_SYSTEMD (system); + gchar *seat; + gint ret; + + sd_session_get_seat (manager->priv->session_id, &seat); + ret = sd_seat_can_multi_session (seat); + free (seat); + + return ret > 0; +} + +static gboolean +gsm_systemd_can_restart (GsmSystem *system) +{ + GsmSystemd *manager = GSM_SYSTEMD (system); + gchar *rv; + GVariant *res; + gboolean can_restart; + + res = g_dbus_proxy_call_sync (manager->priv->sd_proxy, + "CanReboot", + NULL, + 0, + G_MAXINT, + NULL, + NULL); + if (!res) { + g_warning ("Calling CanReboot failed. Check that logind is " + "properly installed and pam_systemd is getting used at login."); + return FALSE; + } + + g_variant_get (res, "(s)", &rv); + g_variant_unref (res); + + can_restart = g_strcmp0 (rv, "yes") == 0 || + g_strcmp0 (rv, "challenge") == 0; + + g_free (rv); + + return can_restart; +} + +static gboolean +gsm_systemd_can_restart_to_firmware_setup (GsmSystem *system) +{ + GsmSystemd *manager = GSM_SYSTEMD (system); + const gchar *rv; + GVariant *res; + gboolean can_restart; + GError *error = NULL; + + res = g_dbus_proxy_call_sync (manager->priv->sd_proxy, + "CanRebootToFirmwareSetup", + NULL, + G_DBUS_CALL_FLAGS_NONE, + G_MAXINT, + NULL, + &error); + if (!res) { + g_warning ("Calling CanRebootToFirmwareSetup failed. Check that logind is " + "properly installed and pam_systemd is getting used at login: %s", + error->message); + g_error_free (error); + return FALSE; + } + + g_variant_get (res, "(&s)", &rv); + + can_restart = g_strcmp0 (rv, "yes") == 0 || + g_strcmp0 (rv, "challenge") == 0; + + g_variant_unref (res); + + return can_restart; +} + +static void +gsm_systemd_set_restart_to_firmware_setup (GsmSystem *system, + gboolean enable) +{ + GsmSystemd *manager = GSM_SYSTEMD (system); + GVariant *res; + GError *error = NULL; + + res = g_dbus_proxy_call_sync (manager->priv->sd_proxy, + "SetRebootToFirmwareSetup", + g_variant_new ("(b)", enable), + G_DBUS_CALL_FLAGS_NONE, + G_MAXINT, + NULL, + &error); + if (!res) { + g_warning ("Calling SetRebootToFirmwareSetup failed. Check that logind is " + "properly installed and pam_systemd is getting used at login: %s", + error->message); + g_error_free (error); + } + + g_variant_unref (res); +} + +static gboolean +gsm_systemd_can_stop (GsmSystem *system) +{ + GsmSystemd *manager = GSM_SYSTEMD (system); + gchar *rv; + GVariant *res; + gboolean can_stop; + + res = g_dbus_proxy_call_sync (manager->priv->sd_proxy, + "CanPowerOff", + NULL, + 0, + G_MAXINT, + NULL, + NULL); + if (!res) { + g_warning ("Calling CanPowerOff failed. Check that logind is " + "properly installed and pam_systemd is getting used at login."); + return FALSE; + } + + g_variant_get (res, "(s)", &rv); + g_variant_unref (res); + + can_stop = g_strcmp0 (rv, "yes") == 0 || + g_strcmp0 (rv, "challenge") == 0; + + g_free (rv); + + return can_stop; +} + +static gboolean +gsm_systemd_is_login_session (GsmSystem *system) +{ + GsmSystemd *manager = GSM_SYSTEMD (system); + int res; + gboolean ret; + gchar *session_class = NULL; + + ret = FALSE; + + if (manager->priv->session_id == NULL) { + return ret; + } + + res = sd_session_get_class (manager->priv->session_id, &session_class); + if (res < 0) { + g_warning ("Could not get session class: %s", strerror (-res)); + return FALSE; + } + ret = (g_strcmp0 (session_class, "greeter") == 0); + free (session_class); + + return ret; +} + +static gboolean +gsm_systemd_can_suspend (GsmSystem *system) +{ + GsmSystemd *manager = GSM_SYSTEMD (system); + gchar *rv; + GVariant *res; + gboolean can_suspend; + + res = g_dbus_proxy_call_sync (manager->priv->sd_proxy, + "CanSuspend", + NULL, + 0, + G_MAXINT, + NULL, + NULL); + if (!res) { + g_warning ("Calling CanSuspend failed. Check that logind is " + "properly installed and pam_systemd is getting used at login."); + return FALSE; + } + + g_variant_get (res, "(s)", &rv); + g_variant_unref (res); + + can_suspend = g_strcmp0 (rv, "yes") == 0 || + g_strcmp0 (rv, "challenge") == 0; + + g_free (rv); + + return can_suspend; +} + +static gboolean +gsm_systemd_can_hibernate (GsmSystem *system) +{ + GsmSystemd *manager = GSM_SYSTEMD (system); + gchar *rv; + GVariant *res; + gboolean can_hibernate; + + res = g_dbus_proxy_call_sync (manager->priv->sd_proxy, + "CanHibernate", + NULL, + 0, + G_MAXINT, + NULL, + NULL); + if (!res) { + g_warning ("Calling CanHibernate failed. Check that logind is " + "properly installed and pam_systemd is getting used at login."); + return FALSE; + } + + g_variant_get (res, "(s)", &rv); + g_variant_unref (res); + + can_hibernate = g_strcmp0 (rv, "yes") == 0 || + g_strcmp0 (rv, "challenge") == 0; + + g_free (rv); + + return can_hibernate; +} + +static void +suspend_done (GObject *source, + GAsyncResult *result, + gpointer user_data) +{ + GDBusProxy *proxy = G_DBUS_PROXY (source); + GError *error = NULL; + GVariant *res; + + res = g_dbus_proxy_call_finish (proxy, result, &error); + + if (!res) { + g_warning ("Unable to suspend system: %s", error->message); + g_error_free (error); + } else { + g_variant_unref (res); + } +} + +static void +hibernate_done (GObject *source, + GAsyncResult *result, + gpointer user_data) +{ + GDBusProxy *proxy = G_DBUS_PROXY (source); + GError *error = NULL; + GVariant *res; + + res = g_dbus_proxy_call_finish (proxy, result, &error); + + if (!res) { + g_warning ("Unable to hibernate system: %s", error->message); + g_error_free (error); + } else { + g_variant_unref (res); + } +} + +static void +gsm_systemd_suspend (GsmSystem *system) +{ + GsmSystemd *manager = GSM_SYSTEMD (system); + + g_dbus_proxy_call (manager->priv->sd_proxy, + "Suspend", + g_variant_new ("(b)", TRUE), + 0, + G_MAXINT, + NULL, + hibernate_done, + manager); +} + +static void +gsm_systemd_hibernate (GsmSystem *system) +{ + GsmSystemd *manager = GSM_SYSTEMD (system); + + g_dbus_proxy_call (manager->priv->sd_proxy, + "Hibernate", + g_variant_new ("(b)", TRUE), + 0, + G_MAXINT, + NULL, + suspend_done, + manager); +} + +static void +inhibit_done (GObject *source, + GAsyncResult *result, + gpointer user_data) +{ + GDBusProxy *proxy = G_DBUS_PROXY (source); + GsmSystemd *manager = GSM_SYSTEMD (user_data); + GError *error = NULL; + GVariant *res; + GUnixFDList *fd_list = NULL; + gint idx; + + res = g_dbus_proxy_call_with_unix_fd_list_finish (proxy, &fd_list, result, &error); + + if (!res) { + g_warning ("Unable to inhibit system: %s", error->message); + g_error_free (error); + } else { + g_variant_get (res, "(h)", &idx); + manager->priv->inhibit_fd = g_unix_fd_list_get (fd_list, idx, &error); + if (manager->priv->inhibit_fd == -1) { + g_warning ("Failed to receive system inhibitor fd: %s", error->message); + g_error_free (error); + } + g_debug ("System inhibitor fd is %d", manager->priv->inhibit_fd); + g_object_unref (fd_list); + g_variant_unref (res); + } + + if (manager->priv->inhibitors == NULL) { + drop_system_inhibitor (manager); + } +} + +static void +gsm_systemd_add_inhibitor (GsmSystem *system, + const gchar *id, + GsmInhibitorFlag flag) +{ + GsmSystemd *manager = GSM_SYSTEMD (system); + + if ((flag & GSM_INHIBITOR_FLAG_SUSPEND) == 0) + return; + + if (manager->priv->inhibitors == NULL) { + g_debug ("Adding system inhibitor"); + g_dbus_proxy_call_with_unix_fd_list (manager->priv->sd_proxy, + "Inhibit", + g_variant_new ("(ssss)", + "sleep:shutdown", + g_get_user_name (), + "user session inhibited", + "block"), + 0, + G_MAXINT, + NULL, + NULL, + inhibit_done, + manager); + } + manager->priv->inhibitors = g_slist_prepend (manager->priv->inhibitors, g_strdup (id)); +} + +static void +gsm_systemd_remove_inhibitor (GsmSystem *system, + const gchar *id) +{ + GsmSystemd *manager = GSM_SYSTEMD (system); + GSList *l; + + l = g_slist_find_custom (manager->priv->inhibitors, id, (GCompareFunc)g_strcmp0); + if (l == NULL) + return; + + g_free (l->data); + manager->priv->inhibitors = g_slist_delete_link (manager->priv->inhibitors, l); + if (manager->priv->inhibitors == NULL) { + drop_system_inhibitor (manager); + } +} + +static void +reboot_or_poweroff_done (GObject *source, + GAsyncResult *res, + gpointer user_data) +{ + GsmSystemd *systemd = user_data; + GVariant *result; + GError *error = NULL; + + result = g_dbus_proxy_call_finish (G_DBUS_PROXY (source), + res, + &error); + + if (result == NULL) { + if (!g_error_matches (error, G_DBUS_ERROR, G_DBUS_ERROR_ACCESS_DENIED)) { + g_warning ("Shutdown failed: %s", error->message); + } + g_error_free (error); + drop_delay_inhibitor (systemd); + g_debug ("GsmSystemd: shutdown preparation failed"); + systemd->priv->prepare_for_shutdown_expected = FALSE; + g_signal_emit_by_name (systemd, "shutdown-prepared", FALSE); + } else { + g_variant_unref (result); + } +} + +static void +gsm_systemd_prepare_shutdown (GsmSystem *system, + gboolean restart) +{ + GsmSystemd *systemd = GSM_SYSTEMD (system); + GUnixFDList *fd_list; + GVariant *res; + GError *error = NULL; + gint idx; + + g_debug ("GsmSystemd: prepare shutdown"); + + res = g_dbus_proxy_call_with_unix_fd_list_sync (systemd->priv->sd_proxy, + "Inhibit", + g_variant_new ("(ssss)", + "shutdown", + g_get_user_name (), + "Preparing to end the session", + "delay"), + 0, + G_MAXINT, + NULL, + &fd_list, + NULL, + &error); + if (res == NULL) { + g_warning ("Failed to get delay inhibitor: %s", error->message); + g_error_free (error); + g_signal_emit_by_name (systemd, "shutdown-prepared", FALSE); + return; + } + + g_variant_get (res, "(h)", &idx); + + systemd->priv->delay_inhibit_fd = g_unix_fd_list_get (fd_list, idx, NULL); + + g_debug ("GsmSystemd: got delay inhibitor, fd = %d", systemd->priv->delay_inhibit_fd); + + g_variant_unref (res); + g_object_unref (fd_list); + + systemd->priv->prepare_for_shutdown_expected = TRUE; + + g_dbus_proxy_call (systemd->priv->sd_proxy, + restart ? "Reboot" : "PowerOff", + g_variant_new ("(b)", TRUE), + 0, + G_MAXINT, + NULL, + reboot_or_poweroff_done, + systemd); +} + +static void +gsm_systemd_complete_shutdown (GsmSystem *system) +{ + GsmSystemd *systemd = GSM_SYSTEMD (system); + + /* remove delay inhibitor, if any */ + drop_delay_inhibitor (systemd); +} + +static gboolean +gsm_systemd_is_last_session_for_user (GsmSystem *system) +{ + char **sessions = NULL; + char *session = NULL; + gboolean is_last_session; + int ret, i; + + if (!gsm_systemd_find_session (&session)) { + return FALSE; + } + + ret = sd_uid_get_sessions (getuid (), FALSE, &sessions); + + if (ret <= 0) { + free (session); + return FALSE; + } + + is_last_session = TRUE; + for (i = 0; sessions[i]; i++) { + char *state = NULL; + char *type = NULL; + + if (g_strcmp0 (sessions[i], session) == 0) + continue; + + ret = sd_session_get_state (sessions[i], &state); + + if (ret != 0) + continue; + + if (g_strcmp0 (state, "closing") == 0) { + free (state); + continue; + } + free (state); + + ret = sd_session_get_type (sessions[i], &type); + + if (ret != 0) + continue; + + if (g_strcmp0 (type, "x11") != 0 && + g_strcmp0 (type, "wayland") != 0) { + free (type); + continue; + } + + is_last_session = FALSE; + } + + for (i = 0; sessions[i]; i++) + free (sessions[i]); + free (sessions); + free (session); + + return is_last_session; +} + +static void +gsm_systemd_system_init (GsmSystemInterface *iface) +{ + iface->can_switch_user = gsm_systemd_can_switch_user; + iface->can_stop = gsm_systemd_can_stop; + iface->can_restart = gsm_systemd_can_restart; + iface->can_restart_to_firmware_setup = gsm_systemd_can_restart_to_firmware_setup; + iface->set_restart_to_firmware_setup = gsm_systemd_set_restart_to_firmware_setup; + iface->can_suspend = gsm_systemd_can_suspend; + iface->can_hibernate = gsm_systemd_can_hibernate; + iface->attempt_stop = gsm_systemd_attempt_stop; + iface->attempt_restart = gsm_systemd_attempt_restart; + iface->suspend = gsm_systemd_suspend; + iface->hibernate = gsm_systemd_hibernate; + iface->set_session_idle = gsm_systemd_set_session_idle; + iface->is_login_session = gsm_systemd_is_login_session; + iface->add_inhibitor = gsm_systemd_add_inhibitor; + iface->remove_inhibitor = gsm_systemd_remove_inhibitor; + iface->prepare_shutdown = gsm_systemd_prepare_shutdown; + iface->complete_shutdown = gsm_systemd_complete_shutdown; + iface->is_last_session_for_user = gsm_systemd_is_last_session_for_user; +} + +GsmSystemd * +gsm_systemd_new (void) +{ + GsmSystemd *manager; + + /* logind is not running ? */ + if (access("/run/systemd/seats/", F_OK) < 0) + return NULL; + + manager = g_object_new (GSM_TYPE_SYSTEMD, NULL); + + return manager; +} + +static void +sd_proxy_signal_cb (GDBusProxy *proxy, + const gchar *sender_name, + const gchar *signal_name, + GVariant *parameters, + gpointer user_data) +{ + GsmSystemd *systemd = user_data; + gboolean is_about_to_shutdown; + + g_debug ("GsmSystemd: received logind signal: %s", signal_name); + + if (g_strcmp0 (signal_name, "PrepareForShutdown") != 0) { + g_debug ("GsmSystemd: ignoring %s signal", signal_name); + return; + } + + g_variant_get (parameters, "(b)", &is_about_to_shutdown); + if (!is_about_to_shutdown) { + g_debug ("GsmSystemd: ignoring %s signal since about-to-shutdown is FALSE", signal_name); + return; + } + + if (systemd->priv->prepare_for_shutdown_expected) { + g_debug ("GsmSystemd: shutdown successfully prepared"); + g_signal_emit_by_name (systemd, "shutdown-prepared", TRUE); + systemd->priv->prepare_for_shutdown_expected = FALSE; + } +} + +#else + +GsmSystemd * +gsm_systemd_new (void) +{ + return NULL; +} + +#endif + |